hi michael
thanks that was good explaination
can u tell me why? for what "ip mroute-cache" is used on serial interfaces
----- Original Message -----
From: Michael Fountain <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Wednesday, November 08, 2000 9:31 PM
Subject: Re: IP route cache
> It determines how the router switches packets.
>
> If you use 'ip route-cache' then the router will be fast-switching the
> packets. The router keeps a cached memory full of recently used (which
> should often equal heavily used) routes & destinations. When a packet
comes
> in it can use that cache to determine where to send the packet without
> having to do routing lookups.
>
> If you use 'no ip route-cache' then the router will be process-switching
and
> will do route lookups for every packet.
>
> I think Cisco recommends that if you are running a serial link that is
> slower then T1 speed to go ahead and do 'no ip route-cache' because the
link
> is so slow (number of packets so low) that the time saved by the
route-cache
> isn't worth the memory of keeping all of that information.
>
> Also, if you have multiple paths to the same destination and are doing
> fast-switching, the router will load balance the traffic on a
> per-destination basis because once the destination output port is in the
> cache all traffic following it will go out the same port.
Process-switching
> will load balance on a per-packet basis since each packet is looked at
> individually.
>
> hope that helps,
> Mike
>
> >
> >Can someone describe why I would want to use the ip route-cache (or no ip
> >route-cache) command. I've found references on the Cisco site about how
to
> >use it, but not why.
> >
> >Tony Russell
> >Network Engineer
> >IBEAM Broadcasting
>
> _________________________________________________________________________
> Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.
>
> Share information about yourself, create your own public profile at
> http://profiles.msn.com.
>
> _________________________________
> FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
> Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
_________________________________________________________
Do You Yahoo!?
Get your free @yahoo.com address at http://mail.yahoo.com
_________________________________
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
